Smoke looks blurry even though resolution is set to a high value
Number of Divisions has nothing to do with &quot;blurry&quot; result. More divisions gives more details (volume grid is detailed). You can try to sharpen with ...
Default 32 Divisions

add Math node Multiply 100 into Density socket

add node Color Ramp, to get rid of lines ...

change Render Properties &gt; Volumes &gt; Step Rate 0.1

(Step Rate - lower value less &quot;lines&quot; in a volume.)
Play with ColorRamp to get more or less of volume ...